properly respect REFRESH_TOKEN_EXPIRE_SECONDS when generating new tokens

see: ansible#6630
see: jazzband/django-oauth-toolkit#746

awx/api/urls/oauth2_root.py

@@ -1,11 +1,15 @@
 # Copyright (c) 2017 Ansible, Inc.
 # All Rights Reserved.
+from datetime import timedelta
 
+from django.utils.timezone import now
+from django.conf import settings
 from django.conf.urls import url
 
 from oauthlib import oauth2
 from oauth2_provider import views
 
+from awx.main.models import RefreshToken
 from awx.api.views import (
     ApiOAuthAuthorizationRootView,
 )
@@ -14,6 +18,21 @@
 class TokenView(views.TokenView):
 
     def create_token_response(self, request):
+        # Django OAuth2 Toolkit has a bug whereby refresh tokens are *never*
+        # properly expired (ugh):
+        #
+        # https://github.com/jazzband/django-oauth-toolkit/issues/746
+        #
+        # This code detects and auto-expires them on refresh grant
+        # requests.
+        if request.POST.get('grant_type') == 'refresh_token' and 'refresh_token' in request.POST:
+            refresh_token = RefreshToken.objects.filter(
+                token=request.POST['refresh_token']
+            ).first()
+            if refresh_token:
+                expire_seconds = settings.OAUTH2_PROVIDER.get('REFRESH_TOKEN_EXPIRE_SECONDS', 0)
+                if refresh_token.created + timedelta(seconds=expire_seconds) < now():
+                    return request.build_absolute_uri(), {}, 'The refresh token has expired.', '403'
         try:
             return super(TokenView, self).create_token_response(request)
         except oauth2.AccessDeniedError as e:

awx/main/tests/functional/api/test_oauth.py

@@ -1,6 +1,8 @@
-import pytest
 import base64
 import json
+import time
+
+import pytest
 
 from django.db import connection
 from django.test.utils import override_settings
@@ -326,6 +328,38 @@ def test_refresh_accesstoken(oauth_application, post, get, delete, admin):
     assert original_refresh_token.revoked # is not None
 
 
+@pytest.mark.django_db
+def test_refresh_token_expiration_is_respected(oauth_application, post, get, delete, admin):
+    response = post(
+        reverse('api:o_auth2_application_token_list', kwargs={'pk': oauth_application.pk}),
+        {'scope': 'read'}, admin, expect=201
+    )
+    assert AccessToken.objects.count() == 1
+    assert RefreshToken.objects.count() == 1
+    refresh_token = RefreshToken.objects.get(token=response.data['refresh_token'])
+    refresh_url = drf_reverse('api:oauth_authorization_root_view') + 'token/'
+    short_lived = {
+        'ACCESS_TOKEN_EXPIRE_SECONDS': 1,
+        'AUTHORIZATION_CODE_EXPIRE_SECONDS': 1,
+        'REFRESH_TOKEN_EXPIRE_SECONDS': 1
+    }
+    time.sleep(1)
+    with override_settings(OAUTH2_PROVIDER=short_lived):
+        response = post(
+            refresh_url,
+            data='grant_type=refresh_token&refresh_token=' + refresh_token.token,
+            content_type='application/x-www-form-urlencoded',
+            HTTP_AUTHORIZATION='Basic ' + smart_str(base64.b64encode(smart_bytes(':'.join([
+                oauth_application.client_id, oauth_application.client_secret
+            ]))))
+        )
+    assert response.status_code == 403
+    assert b'The refresh token has expired.' in response.content
+    assert RefreshToken.objects.filter(token=refresh_token).exists()
+    assert AccessToken.objects.count() == 1
+    assert RefreshToken.objects.count() == 1
+
+
 
 @pytest.mark.django_db
 def test_revoke_access_then_refreshtoken(oauth_application, post, get, delete, admin):